Yoshiharu Kusumoto

Title: Innovator in Steel Manufacturing: Yoshiharu Kusumoto

Introduction

Yoshiharu Kusumoto is a distinguished inventor based in Chiba, Japan, known for his contributions to the field of materials engineering, particularly in steel manufacturing. With a total of two patents to his name, he has made significant strides in enhancing the properties of high carbon steel sheets, which are essential in various industrial applications.

Latest Patents

Kusumoto's latest inventions showcase his expertise in the production of high carbon steel sheets. His first patent details a **High Carbon Hot-Rolled Steel Sheet**, characterized as a hot-rolled spheroidizing annealed material. This innovative steel sheet includes between 0.2 to 0.7% carbon, alongside controlled amounts of silicon, manganese, phosphorus, sulfur, aluminum, and nitrogen. Notably, it contains carbide particles smaller than 0.5 µm in a volume of up to 15%, with a hardness differential of 10 or smaller across the thickness of the sheet.

In his second patent, titled **Method of Manufacturing High Carbon Cold-Rolled Steel Sheet**, Kusumoto presents a manufacturing process ensuring both excellent stretch-flange formability and uniform hardness. The method involves hot-rolling a specially formulated steel at precise temperatures, followed by a rapid cooling and cold-rolling process, culminating in annealing at high temperatures to optimize the final product’s properties.

Career Highlights

Yoshiharu Kusumoto currently works at JFE Steel Corporation, a company renowned for its advancements in steel production technologies. His work embodies a blend of innovative thinking and technical skill, contributing significantly to the development of materials that meet ever-evolving industrial demands.

Collaborations

Kusumoto has collaborated with notable colleagues in his field, including Nobusuke Kariya and Norio Kanamoto. Together, they strive to push the boundaries of steel manufacturing processes and material properties, fostering a culture of innovation within their organization.

Conclusion

Yoshiharu Kusumoto's impactful innovations in high carbon steel manufacturing not only reflect his exceptional inventiveness but also underscore the critical role of advanced materials in modern industry. Through his patents, he continues to contribute to the evolving landscape of materials science, providing solutions that enhance product performance and manufacturing efficiency.